Answer:
4ab(3a² + 2ab − 5b²)
Step-by-step explanation:
simply factorize
Answer:
Percentage of (226Ra) after 900 years is 68%
Step-by-step explanation:
Let P(t) be the amount of (226Ra) present at any time t
Half life of (226 Ra) = 1599 years
If P₀ is initial amount of (226 Ra) then after 1599 years
P(1599)=P₀/2
Decay i amount of radioactive substance is related to time t as

To find value of k

Percentage of radioactive element is:
Amount after 900 years
Asking the Math Gods...
x=2
Answer:
They can play for 1 hour and 20 minutes from the beginning of the game.
Step-by-step explanation:
Start playing with 17 players.
At 1 hour, there are 14 players left.
At 1:05, there are 11 players left.
At 1:10, there are 8 players left.
At 1:15, there are 5 players left.
At 1:20, there are 2 players left, and play stops.
They can play for 1 hour and 20 minutes from the beginning of the game.